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Focuses on the simultaneous measurement of both space-based and object-based attention in a patient with disconnected cerebral hemispheres. Role of left cerebral hemisphere in controlling the shifts of attention between objects; Influence of interhemispheric interactions in the induction of object-based attentional process; Object-based component of attention.

Explores the relationship between spatial attention and feature integration in a parietal patient from a neuropsychological perspective. Importance of spatial attention in facilitating the detection of simple features; Effects of degraded attention on feature conjunctions; Problems encountered in conjoining features.

Presents a study which examined spatial orienting effects, without being aware to signals presented in the neglected hemifield of 2 hemispatial-neglect patients. Methods used for measurement of effects of visual attention; Findings which supports the claim that orienting can occur independently of overt detection; Indications that location information is listed in the neglected field.